Flue purifier



T B. K'EOGH FLUE PURIFI ER Jan. 26, 1932.

Filed June l4, 1930 I N V EN TOR. 720m IZZY ATTORN Patented Jan. 26,1932 UNirs STATES THOMAS B. KEOGH, OF NEW YORK, N. Y.

FLUE runIrIEn Application filed June 14, 1930. Serial No. 461,187.

This invention relates to devices for use in connection with the fluesof stoves, ranges and the like of various kinds and classes, to purifythe exhaust gases or products of combustion discharged through the fluesof apparatus of this class; and the object of the invention is toprovide a device which may be arranged directly upon the flue dischargeof a stove or range or may constitute a part of a flue pipe leadingtherefrom and involving a liquid container exposed to the prod nets ofcombustion discharged through the flue whereby the liquid will be heatedand the vapor discharged therefrom utilized for the purpose ofneutralizing or eliminating gaseous substances in the exhaust and tootherwise purify such exhaust; a further object being to provide meansfor screening the products discharged from the device after beingsubjected to the vapor and/0r steam thereof; a further object being toprovide bafliing means associated with the liquid container to directthe vapor and steam toward the flue passage surrounding said container;a further object being to provide means for introducing fresh air intothe flue passage of the device at the lower end portion thereof toencourage the circulation of the exhaust gases and to localize thiscirculation, preferably at the front portion of the device; and withthese and other objects in view, the invention consists in a device ofthe class and for the purpose specified which is simple in construction,efficient in use, and which is constructed as hereinafter described andclaimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which the separate partsof my improvement are designated by suitable reference characters ineach of the views, and in which:

Fig. 1 is a view, diagrammatically illustrating a cooking stove, andindicating one of my improved devices arranged thereon.

Fig. 2 is an enlarged, sectional, detail View through the device shownin Fig. 1.

Fig. 3 is a plan and sectional view of the structure shown in Fig. 2,the section being 50 on the line 33 of Fig. 2; and,

Fig. 4 is a partial section on the line 4 4: of Fig. 3.

In Fig. 1 of the drawings, I have diagrammatically indicated at 5, astove or range which may be of any of the conventional types or forms,employing coal, gas, fuel oil or the like as a fuel or an electricheating unit. At 6, I haveindicatedthefluedischarge of the range, partof which is shown in Fig. 2 of the drawings. Mounted upon and encirclingthe flue discharge 6, is one of my improved devices 7, consisting of anouter housing 8 which is of a cross sectional form corresponding to theflue discharge 6, and is shown elliptical in the accompanying drawmgs asseen in Fig. 3. The housing 8 forms what may be termed a flue pipe andmay in fact, constitute the flue pipe of apparatus of the class underconsideration.

Arranged in the pipe 8 is a container 9, supported upon cross bars 10,the central portions of which are depressed to form an alignment seat11, to centralize the container 9 in the pipe 8, and the ends of thebars 10 are bent downwardly and extended beneath the pipe 8 to formsupporting feet 12, it being noted that the pipe 8 is offset outwardlyas seen at 13, where thebars are located, in order that the lower end ofsaid pipe may fit snugly around the flange 6a of the discharge 6.Supported in the pipe 8 above the top of the container 9 is a removablescreen 14, which in the construction shown, has four projecting pins 15seating in grooves formed in the top of the pipe 8. This screen ispreferably of a very finemesh so as to function as a strainer forstraining the products of combustion or exhaust which are dischargedtherethrough. Attached to the top of the container 9 are four outwardlyextending a guide and alignment arms 16, which serve to centralize thetop of the container in the pipe 8 and also to reinforce the same, saidarms being removable with the container when the same is removed fromthe pipe for cleaning or other purposes.

I also preferably support above the container 9, a baflle plate 17 whichis of a contour corresponding to the cross section of the container andpipe. The central portion of this plate is slightly coned and theperipheral edge 17a is bent or flared upwardly at a point substantiallyin alignment with the wall of the container 9 so as to form a contracteddischarge 18, between the baffle plate and the top of the container 9,and this flange also forms a restricted passage 19, between its edge andthe wall of the pipe 8. The bafiie 17 i supported in connection with thecentral portion of the screen 14 as seen at 20.

From the foregoing, it will be apparent that the products of combustionrising through the discharge 6 will pass onto the bottom of thecontainer 9 and upwardly around said container through the annularpassage 21, the only obstruction of which is formed by the bars 10.These products of combustion extend to the flange 17a of the baffle 17and around the same into the chamber 22 above said bevel and out throughthe screen or strainer 14:, whereas vapor or steam from the chamber 23arranged below the bevel and above the container 9 is dis chargedthrough the annular passage 18 and mingles with the products ofcombustion prior to its passage through the annular discharge 19 intothe chamber 22 and serves to eliminate, to a large degree, the gaseouselements of the flue discharge and to neutralize the same, as well as topu -ify the flue discharge prior to its transmission through thestrainer, the latter also serving to retain carbon, soot or greasymatter within the device and prevent its discharge into the room orcompartment in which the apparatus is arranged.

To aid in accomplishing the results above specified, and to encouragethe circulation of the products of combustion, and still further tolocalize them primarily at the front side of the device 7, I form twofresh air vent passages 2l at the front side of the device 7, adjacentthe lower end thereof.

These vent passages are formed by cutting portions of the pipe 8 andbending the cut portions inwardly to form beveled walls 25 as indicatedin Fig. 4 of the drawings so that the current of fresh air is directedupwardly into the chamber 21, thus preventing the direct discharge ofthe products of combustion outwardly through the openings 24.

While my improved device is designed primarily for use in connectionwith apparatus of the class under consideration wherein the products ofcombustion are discharged directly into the room in which the apparatusis arranged, the same may be applied to other apparatus of this class;and various changes in and modifications of the construction hereinshown and described may be made within the scope of the appended claimswithout departing from the spirit of my invention or sacrificing itsadvantages.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

l. A flue purifier of the class described comprising a pipe throughwhich products of combustion from a flue discharge are adapted to pass,a liquid container, means for supporting said liquid container withinsaid pipe in such manner as to expose the bottom and entire side wallsof the container to the products of combustion discharged through theflue, and a strainer arranged within the pipe in spaced relation to andabove the top of said container and detachable with respect thereto andforming a cloure for the upper end of said pipe.

2. A flue purifier of the class described comprising a pipe throughwhich products of combustion from a flue discharge are adapted to pass,means for supporting a liquid container within said pipe in such manneras to expose the bottom and entire side Walls of the container to theproducts of combustion discharged through the flue, means disposed abovesaid container Within said pipe for directing vapor and steam from saidcon tainer into the products of combustion circulated upwardly aroundthe walls of said 0011- tainer, and means in one side of said pipeadjacent the lower end of the container for introducing fresh air intothe products of combustion passing upwardly around said container.

3. A flue purifier of the class described comprising a pipe throughwhich products of combustion from a flue discharge are adapted to pass,means for supporting a liquid container within said pipe in such manneras to expose the bottom and entire side walls of the container to theproducts of combustion discharged through the flue, means disposed abovesaid container within said pipe for directing vapor and steam from saidcontainer into the products of combustion circulated upwardly around thewalls of said container, means in one side of said pipe adjacent thelower end of the container for introducing fresh air into the productsof combustion passing upwardly around said container, said last namedmeans involving ports having beveled walls for directing said fresh airupwardly.

a. A flue purifier of the class described comprising a pipe throughwhich products of combustion from a flue discharge are adapted to pass,means for supporting a liquid container within said pipe in such manneras to expose the bottom and entire side walls of the container to theproducts of combustion discharged through the flue, means disposed abovesaid container within said pipe for directing vapor and steam from saidcontainer into the products of combustion circulated upwardly around thewalls of said container, means in one side of said pipe adjacent thelower end of the container for introwardl and a strainer device arran edin said pipe above and in spaced relation to said second named means.

5. A device of the class described comprising a tubular housing, crossbars disposed at the lower end of said housing, a containerv mounted insaid housing and seating upon said bars, said container forming anannular passage between it and said housing, a

strainer device detachably supported in con nection with the upper endof said housing and arranged above and in spaced relation to saidcontainer, and one side wall of the lower end portion of said housingbeing stamped inwardly to form an intake passage having an upwardlyinclined beveled wall whereby fresh air may be introduced into saidpassage.

6. A device of the class described comprising a tubular housing, crossbars disposed at the lower end of said housing, a container mounted insaid housing and seating upon said bars, said container forming anannular passage between it and said housing, a strainer devicedetachably supported in connection with the upper end of said housingand arranged above and in spaced relation to said container, one sidewall of the lower end portion of said housing being stamped inwardly toform an intake passage having an upwardly inclined beveled wall, and abaflie plate supported intermediate said strainer and the upper edge ofsaid container and the peripheral edge of which is arranged over saidannular chamber.

7 The combination with the flue discharge of a range 01": the classspecified, of a liquid container, an elliptical casing encircling saidcontainer and fitting over the flue discharge of the range and formingan annular passage around said container, whereby products of combustionfrom said range may pass upwardly onto the bottom and over the sidewalls of said container, and means for introducing fresh air into theannular passage at the lower end of said container.

8. The combination with the flue discharge of a range of the classspecified, of a liquid container, an elliptical casing encircling saidcontainer and fitting over the flue discharge of the range and formingan annular passage around said container, whereby products of combustionfrom said range may pass upwardly onto the bottom and over the sidewalls of said container, means for introducing fresh air into theannular passage at the lower end of said container, and a screen coverdetachably supported in connection with the top of said casing anddisposed above and in spaced relation to said container.

9. The combination with the flue discharge of a range of the classspecified, of a liquid container, an elliptical casing encircling saidcontainer and fitting over the flue discharge of the range and formingan annular passage around said container, whereby products of combustionfrom said range may pass upwardly onto the bottom and over the sidewalls of said container, means for introducing fresh air into theannular passage at the lower end of said container, a screen coverdetachably supported in connection with the top of said casing anddisposed above and in spaced relation to said container, and a bafileplate supported in connection with said cover above said container toform a peripheral vapor and steam discharge from said container intosaid annular chamber.

In testimony that I claim the foregoing as my invention I have signed myname this 11th day of June, 1930.

THOMAS B. KEOGH.

